Writing a Function Rule

C is half of 8 more than n

C = (1/2)(n + 8)

C is 8 more than half of n

C = (1/2)n + 8

The cost of going to the movies is $5.25 per person.

C = 5.25x

7 less than three-fifths of b is a

a = (3/5)b - 7

a is the difference of 7 and three-fifths of b

a = 7 - (3/5)b

A helicopter hovers 21 feet above the ground. Then the helicopter climbs at a rate of 40 ft/sec. Write a rule that represents the helicopter's height, h, above the ground as a function of time, t.

h = 21 + 40t

A helicopter hovers 40 feet above the ground. Then the helicopter climbs at a rate of 21 ft/sec. Write a rule that represents the helicopter's height, h, above the ground as a function of time, t.

h = 40 + 21t

The price, p, of pizza is $0.95 plus $6.95 for each topping, t, on the pizza.

p = 0.95 + 6.95t

The price, p, of pizza is $6.95 plus $0.95 for each topping, t, on the pizza.

p = 6.95 + 0.95t

y is 5 less than the product of 4 and x

y = 4x - 5

y is the difference of 5 and four times x

y = 5 - 4x

y is four more than the product of 5 and x

y = 5x + 4